Kamov Ka-31

Ka-31
Ka-31 in 2005
Role	Airborne early warning and control Type of aircraft
Manufacturer	Kamov
First flight	1987
Introduction	1995
Status	In service, In production
Primary users	Russian Navy Indian Naval Air Arm People's Liberation Army Navy
Produced	1985–present
Number built	28[1]
Developed from	Kamov Ka-27

The Kamov Ka-31 (NATO reporting name Helix) is a military helicopter originally developed for the Soviet Navy and currently in service in Russia, China, and India in the naval airborne early warning and control role.

As with all Kamov helicopters except the Ka-60/-62 family, the Ka-31 has co-axially mounted contra-rotating main rotors. The airframe of the Ka-31 is based on the Kamov Ka-27. One visually distinctive feature of the Ka-31 is the large antenna of the early-warning radar, which is either rotating or folded and stowed under the fuselage. The second is the reduction of the bulky electro-optical sensory suite beneath the cockpit. The landing gear retracts in order to prevent interference with the radar.